No one cares about your URLs (so buy a domain)

In response to Posterous shutting down, Tantek made the comparison to Pownce having been
acquired and subsequently shuttered by Six Apart back in 2008. There’s actually something very interesting about the
blog post announcing Pownce shutting down. At the end of the post, Pownce co-founder and lead engineer Leah Culver
notes,

As for the Pownce team, we’ll continue posting on Vox. You can find me at leahculver.vox.com …

The only way for you to ensure the integrity and longevity of your content is for you to take ownership of how it is
accessed. Do yourself a favor and go buy a domain that you use for publishing your content.